Home / 1,611.35-2,417.27-686.91

Finding the Fourth Proportional to 1,611.35, 2,417.27 and 686.91

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Solution

The fourth proportional to 1,611.35, 2,417.27 and 686.91 is: 1,030.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.35 : 2,417.27 = 686.91 : x
  2. Step 2: Convert to fraction form
    1,611.35/2,417.27 = 686.91/x
  3. Step 3: Cross multiply
    1,611.35x = 2,417.27 × 686.91
  4. Step 4: Simplify right side
    1,611.35x = 1,660,439.59
  5. Step 5: Solve for x
    x = 1,660,439.59/1,611.35
  6. Step 6: Final answer
    x = 1,030.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.